Sofa



FIG. 1 is a front left perspective view of a first embodiment of a sofa showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a left side elevation view thereof, the right side view being a mirror image;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a front left perspective view of a second embodiment of a sofa showing our new design;

FIG. 7 is a front elevation view thereof;

FIG. 8 is a left side elevation view thereof, the right side view being a mirror image;

FIG. 9 is a rear elevation view thereof; and,

FIG. 10 is a top plan view thereof.

FIGS. 6, 7, 9, and 10 include a symbolic break shown in broken lines. The broken lines as well as those portions of the article between the break lines form no part of the claimed design. 

CLAIM The ornamental design for a sofa, as shown and described. 